SOLVATOCHROMISM IN MOSSBAUER-SPECTROSCOPY - EFFECTS OF SOLVENTS ON STRUCTURE AND ELECTRONIC-STRUCTURE OF IRON AND TIN-COMPOUNDS

The Mossbauer parameters of nine tin and iron compounds, measured in quick-frozen solutions in different solvents (altogether 59 systems), were used to describe the effects of the solvents on these parameters (i.e. solvatochromism in Mossbauer spectroscopy) by an empirical model. It was shown that the solvent dependence of the isomer shift could be described for all of the systems studied, while the solvent dependence of the quadrupole splitting could be described for most of the systems, as a linear function of two or three independent solvation parameters (the Gutmann donicity, the Dimroth-Reichardt E(T) Value and the relative permittivity). The use of this model provided information on the natures and contributions of the different processes participating in the solvent effect.